WO2015111220A1

WO2015111220A1 - Heat exchanger and air conditioning device

Info

Publication number: WO2015111220A1
Application number: PCT/JP2014/051683
Authority: WO
Inventors: 石橋　晃; 真哉東井上; 伊東　大輔; 拓未西山; 繁佳松井; 裕樹宇賀神; 岡崎　多佳志; 厚志望月
Original assignee: 三菱電機株式会社
Priority date: 2014-01-27
Filing date: 2014-01-27
Publication date: 2015-07-30
Also published as: CN205957761U; JPWO2015111220A1

Abstract

A heat exchanger (1) is provided with: a primary heat exchange section (100) having first heat transfer pipes and a header section which has a branch flow passage formed therein; and a secondary heat exchange section (200) having second heat transfer pipes and a first member which has a branch flow passage formed therein. The header section and the first member are arranged side by side at a distance from each other, and a first member is a branch pipe.

Description

Heat exchanger and air conditioner

The present invention relates to a heat exchanger and an air conditioner.

Some conventional heat exchangers include a main heat exchange unit having a plurality of heat transfer tubes and a sub heat exchange unit having a plurality of heat transfer tubes. When the heat exchanger acts as an evaporator, the refrigerant that has passed through the auxiliary heat exchange unit flows into the main heat exchange unit. When the heat exchanger acts as a condenser, the refrigerant that has passed through the main heat exchange unit flows into the sub heat exchange unit. The auxiliary heat exchange unit is disposed below the gravitational direction as compared with the main heat exchange unit. Therefore, when the heat exchanger acts as a condenser, the liquid refrigerant flows in a concentrated manner in the lower part of the heat exchanger 1, and heat transfer between the refrigerant in the saturation region and the refrigerant in the supercooling region is suppressed. The main heat exchange part and the sub heat exchange part have a header in which a branch channel that branches at least one channel into a plurality of channels is formed (see, for example, Patent Document 1).

JP 2012-163328 A (paragraph [0042] to paragraph [0057], FIGS. 2 to 4)

In the conventional heat exchanger, the header of the main heat exchange part and the header of the sub heat exchange part are integrated. Therefore, for example, in the case where the heat exchanger acts as a condenser and the refrigerant is in a saturated liquid state in the main heat exchange part and in a supercooled liquid state in the sub heat exchange part, the integrated header Heat loss occurs due to heat transfer in the case. That is, such a heat exchanger has a problem that heat exchange efficiency is low.

The present invention has been made against the background of the above problems, and an object thereof is to obtain a heat exchanger having improved heat exchange efficiency. Moreover, an object of this invention is to obtain the air conditioning apparatus provided with such a heat exchanger.

The heat exchanger according to the present invention includes a plurality of first heat transfer tubes and at least one flow path branched into a plurality of flow paths, each of the plurality of flow paths being a first end of the first heat transfer pipe. A main heat exchanging portion having a header portion formed with a first branch flow passage communicated with the plurality of second heat transfer tubes, and at least one flow passage is branched into a plurality of flow passages. Each of the flow paths includes a first member formed with a second branch flow path that communicates with the first end of the second heat transfer tube, and a first heat exchange section that includes the first heat exchange section. The at least one flow path of the branch flow path and the second end of the second heat transfer tube communicate with each other, and the header portion and the first member are arranged apart from each other, The first member is a branch pipe.

In the heat exchanger according to the present invention, the header of the main heat exchange unit and the first member of the sub heat exchange unit are arranged apart from each other, and the first member is a branch pipe. Therefore, heat transfer between the refrigerant of the main heat exchange unit and the refrigerant of the sub heat exchange unit is suppressed, and the heat exchange efficiency is improved.

1 is a perspective view of a heat exchanger according to Embodiment 1. FIG. It is a top view of the main heat exchange part of the heat exchanger which concerns on Embodiment 1. FIG. FIG. 3 is a schematic cross-sectional view taken along line AA in FIG. 2 of the main heat exchange section of the heat exchanger according to Embodiment 1. It is a top view of the sub heat exchange part of the heat exchanger which concerns on Embodiment 1. FIG. FIG. 5 is a schematic cross-sectional view taken along line BB in FIG. 4 of the auxiliary heat exchange unit of the heat exchanger according to Embodiment 1. It is a figure for demonstrating a structure and operation | movement of the air conditioning apparatus to which the heat exchanger which concerns on Embodiment 1 is applied. It is a figure for demonstrating a structure and operation | movement of the air conditioning apparatus to which the heat exchanger which concerns on Embodiment 1 is applied. It is a perspective view of the modification of the heat exchanger which concerns on Embodiment 1. FIG. It is a perspective view of the heat exchanger which concerns on Embodiment 2. FIG. It is a perspective view of the modification of the heat exchanger which concerns on Embodiment 2. FIG.

Hereinafter, the heat exchanger according to the present invention will be described with reference to the drawings.
In addition, the structure, operation | movement, etc. which are demonstrated below are only examples, and the heat exchanger which concerns on this invention is not limited to the case where it is such a structure, operation | movement, etc. Moreover, in each figure, the same code | symbol is attached | subjected to the same or similar thing, or attaching | subjecting code | symbol is abbreviate | omitted. Further, the illustration of the fine structure is simplified or omitted as appropriate. In addition, overlapping or similar descriptions are appropriately simplified or omitted.

Moreover, although the case where the heat exchanger which concerns on this invention is applied to an air conditioning apparatus is demonstrated below, it is not limited to such a case, For example, the other refrigeration cycle apparatus which has a refrigerant | coolant circulation circuit May be applied. Moreover, although the case where an air conditioning apparatus switches between heating operation and cooling operation is demonstrated, it is not limited to such a case, You may perform only heating operation or cooling operation.

Embodiment 1 FIG.
The heat exchanger according to Embodiment 1 will be described.
<Configuration and operation of heat exchanger>
Below, the structure and operation | movement of the heat exchanger which concern on Embodiment 1 are demonstrated.
(Schematic configuration and schematic operation of heat exchanger)
The schematic configuration and schematic operation of the heat exchanger according to Embodiment 1 will be described below.
1 is a perspective view of a heat exchanger according to Embodiment 1. FIG. In addition, in FIG. 1, the flow of the refrigerant | coolant at the time of the heat exchanger 1 acting as an evaporator is shown by the arrow.

As shown in FIG. 1, the heat exchanger 1 includes an upwind heat exchanging unit 2 disposed on the windward side in the direction of passage of air passing through the heat exchanger 1 (white arrow in the figure), and the leeward And a leeward side heat exchanging unit 3 disposed on the side.

The windward heat exchange unit 2 includes a plurality of windward heat transfer tubes 11 and a plurality of windward fins 12 joined to the plurality of windward heat transfer tubes 11 by brazing, for example. The leeward side heat exchange unit 3 includes a plurality of leeward side heat transfer tubes 21 and a plurality of leeward side fins 22 joined to the plurality of leeward side heat transfer tubes 21 by brazing or the like, for example. The arrangement of the plurality of windward side heat transfer tubes 11 is shifted to the lower side in the gravity direction as compared with the arrangement of the plurality of leeward side heat transfer tubes 21.

The windward side heat transfer tube 11 and the leeward side heat transfer tube 21 are flat tubes, and a plurality of flow paths are formed inside thereof. Each of the plurality of windward side heat transfer tubes 11 and the plurality of leeward side heat transfer tubes 21 is bent in a hairpin shape in the step direction between both end portions to form folded

portions

11a and 21a. The windward side heat transfer tube 11 and the leeward side heat transfer tube 21 are arranged in a plurality of stages in a direction intersecting with the passage direction of air passing through the heat exchanger 1 (the white arrow in the figure). The windward side heat transfer tube 11 and the leeward side heat transfer tube 21 may be circular tubes (for example, a circular tube having a diameter of 4 mm).

The end portions of the windward side heat transfer tube 11 or the leeward side heat transfer tube 21 are not formed by bending the end portions of the windward side heat transfer tube 11 and the leeward side heat transfer tube 21 into a hairpin shape and forming folded

portions

11a and 21a. And the end of the windward side heat transfer tube 11 or the leeward side heat transfer tube 21 in the adjacent stage are connected via a connecting member having a flow path formed therein, whereby the refrigerant is folded back. May be.

The windward side heat exchanging unit 2 includes an upwind header 13 in which a branch channel 13a that branches one channel into a plurality of channels is formed. One end of each of the plurality of windward side heat transfer tubes 11 disposed on the upper side in the gravity direction among the plurality of windward side heat transfer tubes 11 passes through one flow path formed in the windward side header 13. The branch channel 13a that branches into a plurality of channels is connected to each of the plurality of channels. The windward header 13 corresponds to a part of the “header portion” in the present invention. The branch channel 13a corresponds to the “first branch channel” in the present invention. The windward heat transfer tube 11 connected to the windward header 13 corresponds to the “first heat transfer tube” in the present invention. The end connected to the windward header 13 of the windward heat transfer tube 11 corresponds to the “first end” of the “first heat transfer tube” in the present invention.

The leeward side heat exchanging unit 3 includes a leeward side header 23 in which a branch channel 23a that branches one channel into a plurality of channels is formed. One end of each of the plurality of leeward heat transfer tubes 21 arranged on the upper side in the direction of gravity among the plurality of leeward heat transfer tubes 21 passes through one flow path formed in the leeward header 23. The branch channel 23a that branches into a plurality of channels is connected to each of the plurality of channels. A refrigerant pipe is connected to the one flow path of the branch flow path 23a that branches one flow path into a plurality of flow paths. The leeward header 23 corresponds to a part of the “header portion” in the present invention. The branch channel 23a corresponds to the “third branch channel” in the present invention. The leeward heat transfer tube 21 connected to the leeward header 23 corresponds to the “first heat transfer tube” in the present invention. The end connected to the leeward header 23 of the leeward heat transfer tube 21 corresponds to the “second end” of the “first heat transfer tube” in the present invention.

One end of each of the plurality of windward side heat transfer tubes 11 disposed on the lower side of the gravity direction among the plurality of windward side heat transfer tubes 11 and the direction of gravity of the plurality of leeward side heat transfer tubes 21. One end of each of the plurality of leeward side heat transfer tubes 21 disposed on the lower side is a branch channel formed in the lower three-way tube 41 to branch one channel into two channels 41a is connected to the two flow paths. The lower three-way pipe 41 has, for example, a Y shape. The lower three-way pipe 41 corresponds to the “first member” in the present invention. The branch channel 41a corresponds to the “second branch channel” in the present invention. The windward side heat transfer tube 11 and the leeward side heat transfer tube 21 connected to the lower three-way tube 41 correspond to the “second heat transfer tube” in the present invention. The end portion connected to the lower three-way tube 41 of the windward side heat transfer tube 11 and the leeward side heat transfer tube 21 corresponds to the “first end portion” of the “second heat transfer tube” in the present invention.

Of the plurality of windward side heat transfer tubes 11, the other end of each of the plurality of windward side heat transfer tubes 11 disposed on the lower side in the direction of gravity and the direction of gravity among the plurality of leeward side heat transfer tubes 21. The other end of each of the plurality of leeward heat transfer tubes 21 arranged on the lower side is a branch channel formed in the upper three-way tube 51 to branch one channel into two channels 51a is connected to the two flow paths. The upper three-way pipe 51 is, for example, Y-shaped. The upper three-way pipe 51 corresponds to the “second member” in the present invention. The branch channel 51a corresponds to the “fourth branch channel” in the present invention. The windward side heat transfer tube 11 and the leeward side heat transfer tube 21 connected to the upper three-way tube 51 correspond to the “second heat transfer tube” in the present invention. The end connected to the upper three-way tube 51 of the windward side heat transfer tube 11 and the leeward side heat transfer tube 21 corresponds to the “second end” of the “second heat transfer tube” in the present invention.

There are two lower three-way pipes 41, one of the lower three-way pipes 41 arranged in the upper stage, one of the branch channels 41a that branches the two channels into two channels, and the lower three-way pipe 41. The one flow path of the branch flow path 41a that branches one flow path into two flow paths of the provided lower three-way pipe 41 is a single flow path formed in the lower three-way joint 42 with two flow paths. The branch channel 42a that branches into two channels is connected to the two channels. Refrigerant piping is connected to one of the branch channels 42a that branches one channel into two channels. The lower three-way joint 42 corresponds to a “first joint” in the present invention. The branch flow path 42a corresponds to the “fifth branch flow path” in the present invention.

There are two upper three-way pipes 51, one of the upper three-way pipes 51 arranged in the upper stage, one of the branch channels 51a that branches the two channels into two channels, and the lower three-way pipe 51. The one flow path of the branch flow path 51a that branches one flow path into two flow paths of the provided upper three-way pipe 51 is defined as two flow paths formed in the upper three-way joint 52. The branch channel 52a that branches into two channels is connected to the two channels. One of the branch channels 52a that divides one channel into two channels is divided into one channel formed in the windward header 13 via a pipe 53. The one flow path of the branch flow path 13a branched to is connected. The upper three-way joint 52 corresponds to a “second joint” in the present invention. The branch flow path 52a corresponds to the “sixth branch flow path” in the present invention.

The windward header 13, the leeward header 23, the lower three-way pipe 41, and the upper three-way pipe 51 are arranged apart from each other.

That is, the heat exchanger 1 includes the windward side header 13 and the leeward side header 23, the windward side heat transfer tube 11 and the leeward side heat transfer tube 21 connected thereto, the windward side fins 12 and the leeward side fins 22, A main heat exchange section 100 having a region connected to the windward side heat transfer tube 11 and the leeward side heat transfer tube 21 connected to the windward side header 13 and the leeward side header 23, a lower three-way tube 41, and an upper three-way tube 51; Of the windward side heat transfer tubes 11 and the leeward side heat transfer tubes 21 connected to them, and the windward side heat transfer tubes 11 connected to the lower three-way tube 41 and the upper three-way tube 51 of the windward fins 12 and the leeward side fins 22. And a sub-heat exchanger 200 having a region connected to the leeward heat transfer tube 21, and a lower three-way joint 42 and an upper three-way joint 52.

In the above, the windward fin 12 and the leeward fin 22 are connected to the windward header 13 and the leeward header 23, and the lower three-way pipe 41 and the upper three-way pipe. Although the case where it straddles the windward side heat transfer tube 11 and the leeward side heat transfer tube 21 connected to 51 has been described, it is not limited to such a case, and the windward side fins 12 and the leeward side fins 22 A region connected to the windward side heat transfer tube 11 and the leeward side heat transfer tube 21 connected to the windward side header 13 and the leeward side header 23, and the windward side heat transfer tube 11 connected to the lower three-way tube 41 and the upper three-way tube 51, and The region connected to the leeward heat transfer tube 21 may be configured with separate fins.

Moreover, although the case where the windward side heat exchanger tube 11 and the leeward side heat exchanger tube 21 are eight is demonstrated above, it is not limited to such a case, The windward side heat exchanger tube 11 and the leeward side heat exchanger tube 21 are Other numbers may be used.

When the heat exchanger 1 acts as an evaporator, the refrigerant flows into the lower three-way joint 42 from the refrigerant pipe, and the refrigerant is distributed to the two lower three-way pipes 41. The refrigerant that has flowed into the lower three-way pipe 41 is distributed to one end of the windward side heat transfer tube 11 of the sub heat exchange unit 200 and one end of the leeward side heat transfer tube 21 of the sub heat exchange unit 200. The refrigerant that has passed through the windward side heat transfer tube 11 of the auxiliary heat exchange unit 200 and the leeward side heat transfer tube 21 of the auxiliary heat exchange unit 200 flows into the upper three-way tube 51 and is joined. The refrigerant that has flowed out of the two upper three-way pipes 51 is joined by the upper three-way joint 52 and flows into the windward header 13, and the refrigerant is one end of the plurality of windward heat transfer pipes 11 of the main heat exchange unit 100. Distributed to the department. The refrigerant that has passed through the plurality of windward side heat transfer tubes 11 of the main heat exchange unit 100 flows into one end of the plurality of leeward side heat transfer tubes 21 of the main heat exchange unit 100 through a row crossing tube described later. To do. The refrigerant that has passed through the plurality of leeward heat transfer tubes 21 of the main heat exchange unit 100 is merged by the leeward header 23 and flows out into the refrigerant pipe.

When the heat exchanger 1 acts as a condenser, the refrigerant flows into the leeward header 23 from the refrigerant pipe, and the refrigerant flows to the other end of the plurality of leeward heat transfer tubes 21 of the main heat exchange unit 100. Distributed. The refrigerant that has passed through the plurality of leeward side heat transfer tubes 21 of the main heat exchange unit 100 flows into the other end of the plurality of windward side heat transfer tubes 11 of the main heat exchange unit 100 via the row crossing tubes described later. To do. The refrigerant that has passed through the plurality of windward side heat transfer tubes 11 of the main heat exchange unit 100 is merged by the windward header 13 and flows into the upper three-way joint 52. The refrigerant flowing into the upper three-way joint 52 is distributed to the two upper three-way pipes 51, and the upper three-way pipe 51 is connected to the other end of the windward heat transfer pipe 11 of the auxiliary heat exchange unit 200 and the leeward of the auxiliary heat exchange unit 200. It is distributed to the other end of the side heat transfer tube 21. The refrigerant that has passed through the windward side heat transfer tube 11 of the auxiliary heat exchange unit 200 and the leeward side heat transfer tube 21 of the auxiliary heat exchange unit 200 flows into the lower three-way tube 41 and is joined. The refrigerant flowing out of the two lower three-way pipes 41 is joined by the lower three-way joint 42 and flows out into the refrigerant pipe.

(Configuration and operation of main heat exchanger)
Below, the structure and operation | movement of the main heat exchange part of the heat exchanger which concern on Embodiment 1 are demonstrated.
FIG. 2 is a top view of the main heat exchange unit of the heat exchanger according to the first embodiment. 3 is a schematic cross-sectional view taken along line AA in FIG. 2 of the main heat exchange unit of the heat exchanger according to Embodiment 1. FIG. In FIGS. 2 and 3, the flow of the refrigerant when the heat exchanger 1 acts as an evaporator is indicated by arrows.

As shown in FIGS. 2 and 3, one end of the plurality of windward side heat transfer tubes 11 of the main heat exchanging unit 100 is formed on the windward header 13 through a joint 61. The plurality of channels of the branch channel 13a that branches the path into a plurality of channels are connected. Further, at one end of the plurality of leeward heat transfer tubes 21 of the main heat exchange unit 100, one flow path formed in the leeward header 23 is branched into a plurality of flow paths via a joint 61. The plurality of channels of the branch channel 23a are connected. In addition, the other end of the plurality of windward side heat transfer tubes 11 of the main heat exchange unit 100 and the other end of the plurality of leeward side heat transfer tubes 21 of the main heat exchange unit 100 include a joint 61 and a crossover tube. 62 is connected. The crossover tube 62 is, for example, a circular tube. Inside the joint 61, one end portion has a shape along the outer peripheral surface of the windward side heat transfer tube 11 and the leeward side heat transfer tube 21, and the other end portion has, for example, a circular shape. Is done.

When the heat exchanger 1 acts as an evaporator, the refrigerant that has flowed into the windward header 13 is distributed to a plurality of flow paths by the branch flow path 13a, passes through the joint 61, and passes through the joint 61. It flows into one end of the plurality of windward side heat transfer tubes 11. The refrigerant that has passed through the plurality of windward side heat transfer tubes 11 of the main heat exchange unit 100 passes through the joint 61, the crossover tube 62, and the joint 61, and the other of the plurality of leeward side heat transfer tubes 21 of the main heat exchange unit 100. Flows into the end of The refrigerant that has passed through the plurality of leeward heat transfer tubes 21 of the main heat exchange unit 100 passes through the joint 61, flows into the leeward header 23, and merges into one flow path at the branch flow path 23a. It flows into the piping.

When the heat exchanger 1 acts as a condenser, the refrigerant flowing into the leeward header 23 from the refrigerant pipe is distributed to the plurality of flow paths by the branch flow path 23a, passes through the joint 61, and is subjected to main heat exchange. It flows into one end of the plurality of leeward heat transfer tubes 21 of the section 100. The refrigerant that has passed through the plurality of leeward heat transfer tubes 21 of the main heat exchange unit 100 passes through the joint 61, the crossover tube 62, and the joint 61, and the other of the plurality of windward side heat transfer tubes 11 of the main heat exchange unit 100. Flows into the end of The refrigerant that has passed through the plurality of windward side heat transfer tubes 11 of the main heat exchange unit 100 passes through the joint 61, flows into the windward header 13, and is merged into one flow path by the branch flow path 13a. Outflow from one channel.

(Configuration and operation of auxiliary heat exchanger)
Below, the structure and operation | movement of a subheat exchange part of the heat exchanger which concern on Embodiment 1 are demonstrated.
FIG. 4 is a top view of the auxiliary heat exchange unit of the heat exchanger according to the first embodiment. FIG. 5 is a schematic cross-sectional view taken along line BB in FIG. 4 of the auxiliary heat exchange unit of the heat exchanger according to the first embodiment. 4 and 5, the flow of the refrigerant when the heat exchanger 1 acts as an evaporator is indicated by arrows.

As shown in FIG. 4 and FIG. 5, at one end of the plurality of windward side heat transfer tubes 11 of the sub heat exchange unit 200 and one end of the plurality of leeward side heat transfer tubes 21 of the sub heat exchange unit 200, The two flow paths of the branch flow path 41 a formed in the lower three-way pipe 41 and branching the single flow path into two flow paths are connected via the joint 61. Further, the other end of the plurality of windward side heat transfer tubes 11 of the sub heat exchange unit 200 and the other end of the plurality of leeward side heat transfer tubes 21 of the sub heat exchange unit 200 are connected to the upper three-way via a joint 61. The two flow paths of the branch flow path 51a formed in the pipe 51 that branches one flow path into two flow paths are connected.

One branch of the branch channel 41a formed in the lower three-way pipe 41 arranged in the upper stage and branching one channel into two channels, and the lower three-way pipe 41 arranged in the lower stage The one flow path of the branch flow path 41a that divides one flow path into two flow paths is formed by branching one flow path of the lower three-way joint 42 into two flow paths. The branch channel 42a is connected to the two channels. One of the branch flow paths 51a formed in the upper three-way pipe 51 arranged in the upper stage and branching one flow path into two flow paths, and the upper three-way pipe 51 arranged in the lower stage. The one flow path of the branch flow path 51a that branches the one flow path into two flow paths is formed by branching one flow path of the upper three-way joint 52 into two flow paths. The branch flow path 52a is connected to the two flow paths.

When the heat exchanger 1 acts as an evaporator, the refrigerant flowing into the lower three-way joint 42 from the refrigerant pipe is distributed to the two flow paths of the branch flow path 42a and flows into the plurality of lower three-way pipes 41. . The refrigerant that has flowed into the lower three-way pipe 41 is distributed to the two flow paths of the branch flow path 41 a, passes through the joint 61, and is connected to one end of the plurality of windward side heat transfer tubes 11 of the sub heat exchange unit 200 and the sub flow path. It flows into one end of the plurality of leeward heat transfer tubes 21 of the heat exchange unit 200. The refrigerant that has passed through the plurality of windward side heat transfer tubes 11 and the plurality of leeward side heat transfer tubes 21 of the auxiliary heat exchange unit 200 passes through the joint 61 and flows into the plurality of upper three-way tubes 51. The refrigerant that has flowed into the plurality of upper three-way pipes 51 merges into one flow path of the branch flow path 51 a and flows into the upper three-way joint 52. The refrigerant that has flowed into the upper three-way joint 52 is merged into one flow path of the branch flow path 52a and flows out from the one flow path.

When the heat exchanger 1 acts as a condenser, the refrigerant flowing into the upper three-way joint 52 is distributed to the two flow paths of the branch flow path 52a and flows into the plurality of upper three-way pipes 51. The refrigerant that has flowed into the plurality of upper three-way pipes 51 is distributed to the two flow paths of the branch flow path 51a, passes through the joint 61, and the other end of the plurality of windward heat transfer pipes 11 of the auxiliary heat exchange unit 200. And flows into the other end of the plurality of leeward heat transfer tubes 21 of the auxiliary heat exchange unit 200. The refrigerant that has passed through the plurality of windward side heat transfer tubes 11 and the plurality of leeward side heat transfer tubes 21 of the auxiliary heat exchange unit 200 passes through the joint 61 and flows into the plurality of lower three-way tubes 41. The refrigerant that has flowed into the plurality of lower three-way pipes 41 merges into one flow path of the branch flow path 41 a and flows into the lower three-way joint 42. The refrigerant that has flowed into the lower three-way joint 42 merges into one flow path of the branch flow path 42a and flows out to the refrigerant pipe.

<Configuration and operation of air conditioner to which heat exchanger is applied>
Below, the structure and operation | movement of an air conditioning apparatus to which the heat exchanger which concerns on Embodiment 1 is applied are demonstrated.
6 and 7 are diagrams for explaining the configuration and operation of the air-conditioning apparatus to which the heat exchanger according to Embodiment 1 is applied. In addition, FIG. 6 has shown the case where the air conditioning apparatus 91 performs heating operation. FIG. 7 shows a case where the air conditioner 91 performs a cooling operation.

6 and 7, the air conditioner 91 includes a compressor 92, a four-way valve 93, an outdoor heat exchanger (heat source side heat exchanger) 94, an expansion device 95, and an indoor heat exchanger. (Load side heat exchanger) 96, outdoor fan (heat source side fan) 97, indoor fan (load side fan) 98, and control device 99. The compressor 92, the four-way valve 93, the outdoor heat exchanger 94, the expansion device 95, and the indoor heat exchanger 96 are connected by a refrigerant pipe to form a refrigerant circulation circuit. The four-way valve 93 may be another flow path switching device. The outdoor fan 97 may be provided on the leeward side of the outdoor heat exchanger 94, or may be provided on the leeward side of the outdoor heat exchanger 94. The indoor fan 98 may be provided on the leeward side of the indoor heat exchanger 96 or may be provided on the leeward side of the indoor heat exchanger 96.

For example, a compressor 92, a four-way valve 93, a throttle device 95, an outdoor fan 97, an indoor fan 98, various sensors, and the like are connected to the control device 99. By switching the flow path of the four-way valve 93 by the control device 99, the heating operation and the cooling operation are switched.

As shown in FIG. 6, when the air conditioner 91 performs a heating operation, the high-pressure and high-temperature refrigerant discharged from the compressor 92 flows into the indoor heat exchanger 96 through the four-way valve 93, and the indoor fan The room is heated by condensation through heat exchange with air supplied by 98. The condensed refrigerant flows out of the indoor heat exchanger 96 and becomes a low-pressure refrigerant by the expansion device 95. The low-pressure refrigerant flows into the outdoor heat exchanger 94, exchanges heat with the air supplied by the outdoor fan 97, and evaporates. The evaporated refrigerant flows out of the outdoor heat exchanger 94 and is sucked into the compressor 92 through the four-way valve 93. That is, during the heating operation, the outdoor heat exchanger 94 functions as an evaporator, and the indoor heat exchanger 96 functions as a condenser.

As shown in FIG. 7, when the air conditioner 91 performs a cooling operation, the high-pressure and high-temperature refrigerant discharged from the compressor 92 flows into the outdoor heat exchanger 94 through the four-way valve 93, and the outdoor fan Heat exchange with air supplied by 97 condenses. The condensed refrigerant flows out of the outdoor heat exchanger 94 and becomes a low-pressure refrigerant by the expansion device 95. The low-pressure refrigerant flows into the indoor heat exchanger 96 and evaporates by heat exchange with the air supplied by the indoor fan 98, thereby cooling the room. The evaporated refrigerant flows out of the indoor heat exchanger 96 and is sucked into the compressor 92 through the four-way valve 93. That is, during the cooling operation, the outdoor heat exchanger 94 acts as a condenser, and the indoor heat exchanger 96 acts as an evaporator.

The heat exchanger 1 is used for at least one of the outdoor heat exchanger 94 and the indoor heat exchanger 96. The windward heat transfer tube 11 is disposed on the windward side of the air flow generated by driving the outdoor fan 97 and the indoor fan 98, and the leeward heat transfer tube 21 is disposed on the leeward side. By using the heat exchanger 1, the heat exchange efficiency of at least one of the outdoor heat exchanger 94 and the indoor heat exchanger 96 is improved, and thus the energy efficiency of the air conditioner 91 is improved. The energy efficiency in the heating operation is defined by the following formula (1), and the energy efficiency in the cooling operation is defined by the following formula (2).

[Equation 1]
Energy efficiency during heating operation = condenser (indoor heat exchanger 96) capacity / total input (1)

[Equation 2]
Energy efficiency during cooling operation = Evaporator (indoor heat exchanger 96) capacity / all inputs (2)

<Operation of heat exchanger>
Below, the effect | action of the heat exchanger which concerns on Embodiment 1 is demonstrated.
In the heat exchanger 1, the windward header 13, the leeward header 23, the lower three-way pipe 41, and the upper three-way pipe 51 are spaced apart from each other. Therefore, heat transfer between the refrigerant of the main heat exchange unit 100 and the refrigerant of the sub heat exchange unit 200 is suppressed, and the heat exchange efficiency of the heat exchanger 1 is improved. In particular, when the heat exchanger 1 acts as a condenser, heat transfer from the saturated refrigerant to the supercooled refrigerant is suppressed, and the heat exchange efficiency of the heat exchanger 1 is improved. Further, since the lower three-way pipe 41 and the upper three-way pipe 51, that is, the branch pipes are connected to the windward side heat transfer pipe 11 and the leeward side heat transfer pipe 21 of the auxiliary heat exchange unit 200, the heat exchange efficiency of the heat exchanger 1 is improved. To improve design freedom.

In the heat exchanger 1, in the auxiliary heat exchange unit 200, the two flow paths of the branch flow path 41 a that branches one flow path of the lower three-way pipe 41 into two flow paths, and the upper three-way pipe 51. The two flow paths of the branch flow path 51a that branches one flow path into two flow paths are connected so as to straddle between the rows. Therefore, the number of refrigerant branches in the auxiliary heat exchange unit 200 is increased, and the pressure loss generated in the windward side heat transfer tube 11 and the leeward side heat transfer tube 21 is reduced.

In the heat exchanger 1, the arrangement of the plurality of leeward heat transfer tubes 11 is shifted downward in the gravitational direction as compared with the arrangement of the plurality of leeward heat transfer tubes 21. That is, when the heat exchanger 1 acts as an evaporator, in the sub heat exchange unit 200, the two flow paths of the branch flow path 41a that branches one flow path of the lower three-way pipe 41 into two flow paths. The flow path causes the refrigerant to flow out to one end portion of the windward heat transfer tube 11 and to one end portion of the leeward heat transfer tube 21 located on the upper side in the gravity direction as compared with the end portion. With such a configuration, the liquid refrigerant flowing into one end portion of the windward side heat transfer tube 11 becomes larger than the liquid refrigerant flowing into one end portion of the leeward side heat transfer tube 21, and the windward side Since a refrigerant with a large heat load can flow into the heat transfer tube 11, the dryness of each refrigerant joined in the upper three-way pipe 51 becomes uniform, and the heat exchange efficiency of the heat exchanger 1 is further improved. The

<Modification>
FIG. 8 is a perspective view of a modification of the heat exchanger according to the first embodiment. In addition, in FIG. 8, the flow of the refrigerant | coolant at the time of the heat exchanger 1 acting as an evaporator is shown by the arrow.
In the above, the case where there are two lower three-way pipes 41 and two upper three-way pipes 51 has been described, but as shown in FIG. 8, there are three lower three-way pipes 41 and three upper three-way pipes 51, respectively. There may be other than three.

Embodiment 2. FIG.
A heat exchanger according to Embodiment 2 will be described.
Note that description overlapping or similar to that in Embodiment 1 is appropriately simplified or omitted.
<Configuration and operation of heat exchanger>
Below, the structure and operation | movement of a heat exchanger which concern on Embodiment 2 are demonstrated.
(Schematic configuration and schematic operation of heat exchanger)
Below, schematic structure and schematic operation | movement of the heat exchanger which concern on Embodiment 2 are demonstrated.
FIG. 9 is a perspective view of the heat exchanger according to the second embodiment. In addition, in FIG. 9, the flow of the refrigerant | coolant at the time of the heat exchanger 1 acting as an evaporator is shown by the arrow.

As shown in FIG. 9, the heat exchanger 1 includes a sub heat exchange unit 200, a main heat exchange unit 100A to which the sub heat exchange unit 200 is connected, and a main heat exchange unit 100B to which the sub heat exchange unit 200 is not connected. And comprising. That is, the heat exchanger 1 includes two main

heat exchange units

100A and 100B. Each of the two main

heat exchange units

100A and 100B includes a plurality of windward side heat transfer tubes 11, a plurality of leeward side heat transfer tubes 21, a windward side header 13, and a leeward side header 23.

A pipe 53 connected to one of the branch flow paths 52a that branches the one flow path into two flow paths formed in the upper three-way joint 52 is one flow formed in the distributor 54. The branch channel 54a that branches the path into two channels is connected to the one channel. The two flow paths of the branch flow path 54a that branches one flow path into two flow paths are formed on the windward header 13 via

pipes

55A and 55B having capillaries at least in part. The branch channel 13a that branches one channel into a plurality of channels is connected to the one channel.

When the heat exchanger 1 acts as an evaporator, the refrigerant flows into the lower three-way joint 42 from the refrigerant pipe, and the refrigerant is distributed to the two lower three-way pipes 41. The refrigerant that has flowed into the lower three-way pipe 41 is distributed to one end of the windward side heat transfer tube 11 of the sub heat exchange unit 200 and one end of the leeward side heat transfer tube 21 of the sub heat exchange unit 200. The refrigerant that has passed through the windward side heat transfer tube 11 of the auxiliary heat exchange unit 200 and the leeward side heat transfer tube 21 of the auxiliary heat exchange unit 200 flows into the upper three-way tube 51 and is joined. The refrigerant that has flowed out of the two upper three-way pipes 51 is joined by the upper three-way joint 52 and flows into the distributor 54. The refrigerant flowing into the distributor 54 is distributed to the

pipes

55A and 55B and flows into the windward header 13, and the refrigerant flows to one end of the plurality of windward heat transfer tubes 11 of the main

heat exchange units

100A and 100B. Inflow. The refrigerant that has passed through the plurality of windward side heat transfer tubes 11 of the main

heat exchange units

100A, 100B is connected to one end of the plurality of leeward side heat transfer tubes 21 of the main

heat exchange units

100A, 100B via a crossover tube 62 (not shown). Flows into the section. The refrigerant that has passed through the plurality of leeward heat transfer tubes 21 of the main

heat exchange units

100A and 100B is merged by the leeward header 23 and flows out into the refrigerant pipe.

When the heat exchanger 1 acts as a condenser, the refrigerant flows into the leeward header 23 from the refrigerant pipe, and the refrigerant is the other end of the plurality of leeward heat transfer tubes 21 of the main

heat exchange units

100A and 100B. Distributed to the department. The refrigerant that has passed through the plurality of leeward side heat transfer tubes 21 of the main heat exchange unit 100 passes through the crossover tubes 62 (not shown) to the other end of the plurality of windward side heat transfer tubes 11 of the main

heat exchange units

100A and 100B is merged by the windward header 13 and flows into the distributor 54 via the

pipes

55A and 55B. The refrigerant merged by the distributor 54 flows into the upper three-way joint 52. The refrigerant flowing into the upper three-way joint 52 is distributed to the two upper three-way pipes 51, and the upper three-way pipe 51 is connected to the other end of the windward heat transfer pipe 11 of the auxiliary heat exchange unit 200 and the leeward of the auxiliary heat exchange unit 200. It is distributed to the other end of the side heat transfer tube 21. The refrigerant that has passed through the windward side heat transfer tube 11 of the auxiliary heat exchange unit 200 and the leeward side heat transfer tube 21 of the auxiliary heat exchange unit 200 flows into the lower three-way tube 41 and is joined. The refrigerant flowing out of the two lower three-way pipes 41 is joined by the lower three-way joint 42 and flows out into the refrigerant pipe.

<Operation of heat exchanger>
Below, the effect | action of the heat exchanger which concerns on Embodiment 2 is demonstrated.
Also in the heat exchanger 1, the windward header 13, the leeward header 23, the lower three-way pipe 41, and the upper three-way pipe 51 are spaced apart from each other. Therefore, heat transfer between the refrigerants of the main

heat exchange units

100A and 100B and the refrigerant of the auxiliary heat exchange unit 200 is suppressed, and the heat exchange efficiency of the heat exchanger 1 is improved. In particular, when the heat exchanger 1 acts as a condenser, heat transfer from the saturated refrigerant to the supercooled refrigerant is suppressed, and the heat exchange efficiency of the heat exchanger 1 is improved. Further, since the lower three-way pipe 41 and the upper three-way pipe 51, that is, the branch pipes are connected to the windward side heat transfer pipe 11 and the leeward side heat transfer pipe 21 of the auxiliary heat exchange unit 200, the heat exchange efficiency of the heat exchanger 1 is improved. To improve design freedom.

Further, in the heat exchanger 1, in the sub heat exchange unit 200, the two flow paths of the branch flow path 41a that branches the single flow path into two flow paths formed in the lower three-way pipe 41, and The two flow paths of the branch flow path 51a formed in the upper three-way pipe 51 and branching one flow path into two flow paths are connected so as to straddle the rows. In the heat exchanger 1, when the heat exchanger 1 acts as an evaporator, the refrigerant in the auxiliary heat exchange unit 200 is at least partially a capillary tube as compared with the refrigerant in the main heat exchange unit 100. The

pipe

55A, 55B has a high temperature corresponding to the reduced pressure. Therefore, the two flow paths of the branch flow path 41a that branches one flow path into two flow paths, and the two flow paths of the branch flow path 51a that branches one flow path into two flow paths. By connecting the paths so as to straddle between the rows, it becomes possible to reduce the volume of the auxiliary heat exchange unit 200 that becomes high temperature, and the heat exchange efficiency of the heat exchanger 1 is further improved. .

<Modification>
FIG. 10 is a perspective view of a modification of the heat exchanger according to the second embodiment. In addition, in FIG. 10, the flow of the refrigerant | coolant at the time of the heat exchanger 1 acting as an evaporator is shown by the arrow.
Although the case where there is one main heat exchange unit 100B to which the sub heat exchange unit 200 is not connected has been described above, the main heat exchange unit 100B to which the sub heat exchange unit 200 is not connected is illustrated in FIG. Two may be sufficient and it may be other than two.

As mentioned above, although Embodiment 1 and Embodiment 2 were demonstrated, this invention is not limited to description of each embodiment. For example, it is possible to combine all or some of the embodiments.

In addition, in the air conditioner 91 to which the above-described heat exchanger 1 and the heat exchanger 1 are applied, the above-described effects are exhibited when the refrigerant is a refrigerant such as R410A, R32, HFO1234yf. In the above description, the case where the working fluid is air and a refrigerant has been described as an example. However, the present invention is not limited to such a case, and the working fluid may be another gas, liquid, gas-liquid mixed fluid, or the like. The same effect is produced.

Moreover, in the air conditioner 91 to which the heat exchanger 1 and the heat exchanger 1 described above are applied, any refrigerating machine oil may be used, and the refrigerating machine oil is a mineral oil type, an alkylbenzene oil type, an ester oil type, The above-described effects can be achieved with any compatible refrigerating machine oil and incompatible refrigerating machine oil, such as an ether oil type or a fluorine oil type.

DESCRIPTION OF SYMBOLS 1 Heat exchanger, 2 Windward side heat exchange part, 3 Windward side heat exchange part, 11 Windward side heat exchanger tube, 11a Folding part, 12 Windward side fin, 13 Windward side header, 13a Branch flow path, 21 Windward side heat exchanger tube, 21a folding part, 22 leeward fin, 23 leeward header, 23a branch channel, 41 lower three-way tube, 41a branch channel, 42 lower three-way joint, 42a branch channel, 51 upper three-way tube, 51a branch channel, 52 Upper three-way joint, 52a branch channel, 53 piping, 54 distributor, 54a branch channel, 55A, 55B, 55C piping, 61 joint, 62 crossover tube, 91 air conditioner, 92 compressor, 93 four-way valve, 94 outdoor Heat exchanger, 95 throttle device, 96 indoor heat exchanger, 97 outdoor fan, 98 indoor fan 99 control unit, 100, 100A, 100B, 100C main heat exchange part, 200 auxiliary heat exchange unit.

Claims

A plurality of first heat transfer tubes;
A header portion in which at least one flow path is branched into a plurality of flow paths, and each of the plurality of flow paths is formed with a first branch flow path communicating with the first end of the first heat transfer tube; ,
A main heat exchange section having
A plurality of second heat transfer tubes;
A first member in which at least one flow path is branched into a plurality of flow paths, and each of the plurality of flow paths is formed with a second branch flow path communicating with the first end of the second heat transfer tube. When,
A sub heat exchange section having
The at least one flow path of the first branch flow path communicates with the second end of the second heat transfer tube,
The header portion and the first member are arranged apart from each other,
The first member is a heat exchanger, which is a branch pipe.
In the header part,
At least one flow path is branched into a plurality of flow paths, and each of the plurality of flow paths is formed as a third branch flow path communicating with the second end of the first heat transfer tube,
The auxiliary heat exchange unit is
At least one flow path is branched into a plurality of flow paths, the at least one flow path is communicated with the at least one flow path of the first branch flow path, and each of the plurality of flow paths is the first flow path. 2 having a second member formed with a fourth branch flow channel communicating with the second end of the heat transfer tube,
The header portion, the first member, and the second member are spaced apart from each other,
The heat exchanger according to claim 1, wherein the second member is a branch pipe.
The main heat exchange section is plural,
A distributor is provided between the at least one flow path of the first branch flow path and the at least one flow path of the fourth branch flow path in the header portion of each of the plurality of main heat exchange sections. The heat exchanger according to claim 2, which is communicated with each other.
The heat exchanger according to claim 3, wherein the at least one flow path of the first branch flow path and the distributor are communicated via a capillary tube.
A plurality of first heat transfer tubes;
A header section in which at least one flow path is branched into a plurality of flow paths, and each of the plurality of flow paths is formed with a third branch flow path communicating with the second end of the first heat transfer tube; ,
A main heat exchange section having
A plurality of second heat transfer tubes;
A second member in which at least one flow path is branched into a plurality of flow paths, and each of the plurality of flow paths is formed with a fourth branch flow path communicating with the second end of the second heat transfer tube. When,
A sub heat exchange section having
The first end of the first heat transfer tube communicates with the at least one flow path of the fourth branch flow path,
The header portion and the second member are arranged apart from each other,
The second member is a heat exchanger, which is a branch pipe.
The plurality of second heat transfer tubes are a second heat transfer tube disposed on the leeward side and a second heat transfer tube disposed on the leeward side,
The plurality of flow paths of the second branch flow path include the first end portion of the second heat transfer tube disposed on the leeward side and the first heat transfer tube disposed on the leeward side. The heat exchanger according to any one of claims 1 to 4, wherein the heat exchanger is communicated with the end portion.
The heat exchange according to claim 6, wherein the second heat transfer tube disposed on the windward side is disposed on the lower side in the gravitational direction as compared with the second heat transfer tube disposed on the leeward side. vessel.
The plurality of second heat transfer tubes are a second heat transfer tube disposed on the leeward side and a second heat transfer tube disposed on the leeward side,
The plurality of flow paths of the fourth branch flow path include the second end portion of the second heat transfer tube disposed on the windward side and the second heat transfer tube disposed on the leeward side. The heat exchanger according to any one of claims 2 to 5, wherein the heat exchanger is communicated with the end portion.
The first member is a first member disposed in the upper stage, and a first member disposed in the lower stage,
The auxiliary heat exchange unit is
A first branch formed with a fifth branch channel that branches at least one channel into a plurality of channels;
The at least one flow path of the first member disposed in the upper stage and the at least one flow path of the first member disposed in the lower stage are the plurality of the fifth branch flow paths. The heat exchanger according to any one of claims 1 to 4, 6, and 7, communicated with each of the flow paths.
The second member is a second member disposed in the upper stage, and a second member disposed in the lower stage,
The auxiliary heat exchange unit is
A second branch formed with a sixth branch channel that branches at least one channel into a plurality of channels;
The at least one flow path of the second member disposed in the upper stage and the at least one flow path of the second member disposed in the lower stage are the plurality of the sixth branch flow paths. The heat exchanger according to any one of claims 2 to 5, and 8 communicated with each of the flow paths.
An air conditioner comprising the heat exchanger according to any one of claims 1 to 10.